Chaddock reflex


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Related to Chaddock reflex: Oppenheim reflex, Chaddock's sign, Gordon reflex

Chad·dock sign

(chad'ok),
when the lateral malleolar skin area is irritated, extension of the great toe occurs in cases of organic disease of the corticospinal reflex paths.
Synonym(s): Chaddock reflex

Chaddock reflex

Etymology: Charles G. Chaddock, American neurologist, 1861-1936
an abnormal reflex, induced by firmly stroking the ulnar surface of the forearm, characterized by flexion of the wrist and extension of the fingers in fanlike position. It is seen on the affected side in hemiplegia. Compare Gordon's reflex, Oppenheim reflex. See also Babinski's reflex.

chad·dock sign

, Chaddock reflex (chad'ŏk sīn, rē'fleks)
When the external malleolar skin area is irritated, extension of the great toe occurs in cases of organic disease of the corticospinal reflex paths.

Chaddock,

Charles G., U.S. neurologist, 1861-1936.
Chaddock reflex - Synonym(s): Chaddock sign
Chaddock sign - when the external malleolar skin area is irritated, extension of the great toe occurs in cases of organic disease of the corticospinal reflex paths. Synonym(s): Chaddock reflex; external malleolar sign

response

reactive tissue response to stimulus
  • Babinski response see response, extensor plantar

  • Chaddock response provocation of extensor plantar response (in cases with upper motor neurone lesion) by stroking lateral side of lower leg from proximal to distal (compare with response, extensor plantar)

  • extensor plantar response; Babinski response; Babinski reflex slow, reflex dorsiflexion of hallux at first metatarsophalangeal joint, with fanning of lesser toes, and plantarflexion of fourth and fifth toes at 4/5 metatarsophalangeal joints when plantar skin is stimulated; normal in infants up to 7 months old; diagnostic of upper motor neurone lesion in older subjects (see sign, Babinski's; response, Chaddock; response, Gordon; response, Oppenheim)

  • Gordon response provocation of extensor plantar response, by squeezing posterior calf area; indicative of upper motor neurone lesion

  • Oppenheim response; Oppenheim reflex provocation of extensor plantar response, by stroking either side of tibial crest from proximal to distal; indicative of upper motor neurone lesion